Convert Atomic Mass Unit to Poundal
Convert atomic mass unit to poundals instantly. 1 atomic mass unit = 1.178798e-25 poundal — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Poundal to Atomic Mass Unit converter for the reverse conversion.
Units explained
Atomic Mass Unit
One unified atomic mass unit (u) is defined as 1/12 the mass of a carbon-12 atom, about 1.6605E-27 kg.
Introduced to give atomic and molecular masses convenient numerical values.
Atomic, molecular, and nuclear physics and chemistry.
The unified (carbon-12) scale was adopted by IUPAC and IUPAP in 1960-1961.
Poundal
The poundal (pdl) is the FPS absolute unit of force; its mass-equivalent on this scale is about 0.0141 kg.
Defined in the foot-pound-second absolute system in the late 19th century.
Early 20th-century physics and engineering.
Introduced in the absolute FPS system as an alternative to gravitational units.
Atomic Mass Unit to Poundal conversion formula
The relationship between atomic mass unit and poundals:
To convert atomic mass unit to poundals, multiply the value in atomic mass unit by 1.178798e-25. To reverse, multiply poundals by 8.483215e+24.
How to use this converter
Type a value into the calculator. The result in poundals updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Poundal to Atomic Mass Unit converter for the reverse direction.
Step-by-step: convert atomic mass unit to poundals
- Write down the value in atomic mass unit (u).
- Multiply that value by the factor 1.178798e-25.
- The product is the equivalent value in poundals (pdl).
- To reverse, multiply the poundal value by 8.483215e+24.
Worked examples
Example 1 — Convert 1 u to pdl:
1 × 1.178798e-25 = 1.178798e-25 pdl
Example 2 — Convert 100 u to pdl:
100 × 1.178798e-25 = 1.178798e-23 pdl
Real-world example — Sub-micron to millimeter
500,000 atomic mass unit converts to a small everyday quantity in poundals — useful when relating optical-wavelength specifications to physical mounting hardware.
500000 u × 1.178798e-25 = 5.893992e-20 pdl
Real-world example — From wavelengths to millimeter-scale objects
A value of one million atomic mass unit sounds vast at the atomic scale but converts to a small everyday quantity in poundals — useful when relating optical-wavelength specifications to physical mounting hardware.
1000000 u × 1.178798e-25 = 1.178798e-19 pdl
Atomic Mass Unit to Poundal conversion table
Standard reference values for converting atomic mass unit to poundals:
| Atomic Mass Unit [u] | Poundal [pdl] |
|---|---|
| 0.01 | 1.178798e-27 |
| 0.1 | 1.178798e-26 |
| 1 | 1.178798e-25 |
| 2 | 2.357597e-25 |
| 3 | 3.536395e-25 |
| 4 | 4.715193e-25 |
| 5 | 5.893992e-25 |
| 10 | 1.178798e-24 |
| 20 | 2.357597e-24 |
| 30 | 3.536395e-24 |
| 40 | 4.715193e-24 |
| 50 | 5.893992e-24 |
| 100 | 1.178798e-23 |
| 500 | 5.893992e-23 |
| 1000 | 1.178798e-22 |
Frequently asked questions
How many poundals is 1 atomic mass unit?
How do I convert atomic mass unit to poundals?
How do I convert poundals back to atomic mass unit?
How many poundals is 100 atomic mass unit?
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Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 u = 1.178798e-25 pdl) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.